Concrete block making machine



Jan. 25, 1949. e. CARLSEN CONCRETE BLOCK MAKING MACHINE 3 Sheets-Sheet lFiled April 2, 1947 Mm I INVENTOR ALF GI CARLSEN ATTOR NEY Jan. 25,1949. c s N 2,460,167

CONCRETE BLOCK MAKING MACHINE Filed April 2, 1947 3 Sheets-Sheet 2INVENTOR ALF G CARLSEN ATTORNEY Jan. 25, 1949. A. G.- CARLSEN 2,460,167

CONCRETE BLOCK MAKING MACHINE Filed April 2, 1947 3 Sheets-Sheet 3INVENTOR ALF vG. CARLSEN ATTOR N EY ing a vibration for settling theconcrete being molded within the molds.

Pallets 35 rest upon the longitudinal supports and I3. These palletsalso rest upon the movable guide bars 36 located on either end of theframe. The guide bars 36-have upwardly extending guide members 31 whichcontact either side of the pallets 35. Extending beyond and forming partof the supports jl3 are operating fingers 38 for moving the guide bars36. These fingers operate in the cut-out portion 39 of the guide bars.The guide bars are mounted to the frame t through a slot 40 formedtherein and working over the holding bolts 4|, which are fixedly securedto the frame. Y i

I will now describe the operation o lynew and; improved concrete blockmaking machine. First the operating lever 21 is brought tothetpositionshown in Figures 1 and 4-and is held there by the hook 42,which is secured. to the frame I, This causes the connecting links 2| topull the guides 14 towards the center of the machine. This pulls themold members lll'towardsthe' center mold members It). The spacers l2 andare the same thickness as the pallets 35,, therefore, the finished block43 will be the same thickness asthe molds when molding is completed; Thelength of the individual mold members 10 and [8 may vary in length asindicated on the drawings, and they are spacedapart transversely by theremovable cross members 44 as illustrated in Figure 1.

In themolding of the concrete blocks one or more methods may beemployed, The concrete is poured and tamped down by hand being levelledatthe same'tima, Where desirable it may be vibrated by. rotating'thecrank 34 which rotates the ratchetwheels 3| slowly raising the frame Ion the inclined suriace of the ratchet,

then dropping said frame/over the endof the.

members It! the fingers 38 of the plates I3 engage the end of the slot39 of the guide bars 36, which moves the pallets and the molded blocksaway from the center mold members llltolthe position shownin'; Figure'2. When this is. done the ends 45 of the pallets maybe grasped an'dpulled lengthwise.

A guide member 46 is fixedly secured to the opposite end of the palletand'is guided between the mold members Ill and l8'as illustrated at 41,Figure 2, preventing contact of the blocks 43 with the sides of the moldmembers while removing the same lengthwise of the machine. The guidemembers 31 of the guide bars 36 also guide the pallets inthis operation.The spacing ofthe pallets between the mold members is especiallyimportant where knobs 48 are being formed on the blocks, thus preventingbreaking the same ofi as the sar'ne'are being removed from the machine.

Iihave not illustrated where the pallets are removed to after taken fromthe machine, but they come out onto a suitable receiving table orconveyor and are removed to a drying rack where the blocks are dried andcured.

I do not wish to be limited to the exact mechanical construction asother mechanical equivalents mentioned support in spaced relation fromsaid fixed mold member and movable with said second support for movementrelative to said fixed mold and between said mold members for supportingthe molded plastic material, and means for moving said movable moldmember and its support relative to said pallet and said fixed moldmember and simultaneously moving said pallet relativeto saidfixed moldmember to free the pallet and the molded objects thereonlirom'betweensaid mold members.

2., A machine as set forth in claim 1, wherein the means for moving themold member and pallet also includes means for vibrating said moldmembers and said pallet as a unitto compact the plastic material onsaidpallet between'the mold members. z g I 1,

3. A machine asset forth in claim 1, wherein said second-mentionedsupport is movably mounted on a base and. the means formoving the moldmemberand pallet includes an element for cooperating with a vibratorymember mounted on said base for vibrating said supports to compact theplastic material on said pallet and between said moldmembers 4. Amachine as set forth in claim 1, wherein the means for moving the moldmember support and pallet comprises a crank and a link con: nected tosaid mold member, a crank and a delayed action connection between saidmovable moldmember and said pallet. V

5. A machine as set forth in claim 1, wherein the moving means includesa crank connected with the support for. the mold member and mounted on ashaft, and a vibratory member in vibratory relation with said shaft forvibrating the shaft so thatthe: vibrations will .be transmitted tocompact the plastic. material.

6. A machine-formolding plastic material such as concrete and whichcomprises" a support, a mold member fixed on said support and centrallythereof, opposed second movable supports in spaced relation on oppositesides of saidfixed support opposed mold members mounted on the movablesupports for movement relative to said fixed moldmember, palletssupported by andbetween said fixed-mold member and said movable moldmembers, iorsuppcqrting the molded plastic material, and means formoving vsaid secondmentioned supports and movable mold members inopposite directions and relative -to their respective palletsan'd'saidfixed mold member and simultaneously moving said palletsiri-opposite directions and relative to said fixed mold member"vibrating said movable supports and movable 5 pact the plastic materialon said pallets between the mold members.

8. A machine as set forth in claim 6, wherein the means for moving themovable supports and mold members and the pallets comprises a bell crankincluding an extended arm forming an operating handle and oppositelyextending crank arms, links connecting said crank arms with said movablesupports, and delayed action connections between each of said movablesupports and movable mold members and their respective pallets.

9. A concrete block making machine comprising a frame, a centrallydisposed longitudinal support fixed to said frame, a series of moldmembers, spaced apart end to end, fixed to said 15 Number fixed support,movable supports spaced from the fixed supports and runninglongitudinally on opposite sides of said fixed support, spaced apartmold members mounted on said movable support and arranged longitudinallyof the frame, remov- 20 able cross members disposed transversely of andREFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date 916,667 Calkins Mar. 30, 1909 FOREIGNPATENTS Number Country Date 260,554 Italy Sept. 29, 1928

